The 38-year-old has been tipped to retire at the end of the current campaign, but Ferguson insists Scholes will still be an important member of the squad regardless.
He came out of retirement midway through last season, and has made 14 appearances for Ferguson's side this term on the way to a 20th Premier League title for United.
But Scholes did not join in the celebrations at the final whistle of the Aston Villa game last Monday, although Ferguson put that down to his reserved demeanour.
Speaking to the club's official website, Ferguson said: "We'll have to wait and see with Scholes. He's got an injury that is bothering him a lot. I don't think he came onto the pitch but he's not that type.
"He was probably home by the time the game ended!"
Scholes turns 39 next November, but his Old Trafford boss believes he'll still be at United come the start of next season.
"It doesn't matter as he'll be here anyway - whether as a player or coach. He'll be here anyway.
"I think there will come a time when he has to quit anyway, whether it's next year or this year. He's not made his mind up about that.
"He has got a lot to offer us and we do this now, it's a very important part of our club to get players who have made a great contribution."
Scholes and his teammate Ryan Giggs are both expected to take up coaching duties at Old Trafford once they reach the end of their playing days.
Scholes started work on his coaching badges after retiring for the first time in May 2011, but left his post with the reserves to return to the first-team.